What was found
AIRCRAFT IN SHOP FOR 100-HOUR INSPECTION. REMOVED ENGINE COWL, FOUND FIREWALL CRACKED AT COWL MOUNT, FIRST MOUNT ON LEFT SIDE ON LOWER HALF OF FIREWALL. SB 98-53-02 R1 WAS C/W AT TACHOMETER , 195.0 HOURS. NO CRACKS FOUND AT THAT TIME. REPAIRED FIREWALL PER SB 98-53-02 R1.